From Tom Vanderbilt’s recent piece in Slate:

In Greenberg, Ben Stiller plays Greenberg, a drifting musician-turned-carpenter who’s getting over a nervous breakdown. He’s a needy and casually abusive schmuck, a socially awkward and obsessive crank. And if you need any more clues to the extent of his pathological loserdom, here’s one: He doesn’t drive.

[…]

Greenberg is just the most recent film in which a character’s non-automobility–whether for lack of a car or for lack of the ability to drive–is used for comic effect, whether as a metaphor for a deeper personality flaw or as a token of marginality and/or plain creepiness. As the humorist Art Buchwald once observed, “People are broad-minded. They’ll accept the fact that a person can be an alcoholic, a dope fiend, a wife beater and even a newspaperman, but if a man doesn’t drive, there’s something wrong with him.”

We bus, train [ahem], and bike chicks beg to differ.